X0508 4 2025-10-13 0000798528 ODYSSEY MARINE EXPLORATION INC OMEX 0001385250 Gordon Mark 205 S. HOOVER BLVD. STE #210 TAMPA FL 33609 true true false false Chief Executive Officer true Common Stock 2025-10-13 4 S false 20956 3.50 D 632235 D Common Stock 2025-10-14 4 S false 30000 3.7362 D 602235 D Common Stock 2025-10-15 4 S false 30000 3.9790 D 572235 D The securities were sold under a 10b5-1 Trading Plan adopted May 15, 2025 and were acquired upon the vesting of restricted stock units during the period 12/20/2015 through 12/13/2019. This transaction was executed in multiple trades at prices ranging from $3.50 to $4.4999 per share. . The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. /s/Susan A. Fennessey, POA Mark D. Gordon 2025-10-15